Sash-lock.



C L. JOHNSON.

SASH LOCK.

APPLICATION FILED MAR. r. 1916.

1,205,212. Patented Nov. 21, 1916-.

' CizarZes LJaiv s h 2mm- 2.9 mung}? WITEE @IAIE PATENT UFFIQE- CHARLESL. JOHNSON, OF MORRISVILLE, PENNSYLVANIA.

SASH-LOCK.

Application filed March 7, 1916.

To all whom it may concern:

Be it known that 1, CHARLES L. Jornvson, a citizen of the United States,residing at Morrisville, in the county of Bucks and State ofPennsylvania, have invented new and useful Improvements in Sash-Locks,of which the following is a specification.

The invention relates to looks and latches and has for an object toprovide a lock, particularly adaptable to window sashes and the like, tosecure one or a plurality of members against relative movement.

Among other features the invention comprehends a simple device, that canbe easily operated and which will insure an effective locking of oneelement or member relative to another and furthermore prevent anyrattling of the locking element. To this end the invention isparticularly adapted to windows for locking the same against relativemovement, the invention furthermore being neat and compact in appearanceand easily applied to effect the desired purpose.

In the further disclosure of the invention reference is to be had to theaccompanying drawings, constituting a part of this specification, inwhich similar characters of reference denote corresponding parts in allthe views and in which,

Figure 1 is a plan view of the lock, Fig. 2 is a, vertical sectionalview taken through the lock, on the line 22 in Fig. 1, the lock beingshown in applied position, and Fig. 3 is a perspective view of the lock.

Referring more particularly to the views I provide an L shaped body 10,formed as it were of two plates 11, 12, the former having a raisedportion 13, providing a chamber 1%. The plate 12 has an opening 15 inwhich is arranged to slide, a latch element 16, havinga cross groove ordepression 17 in one side and terminating at one end in a re duced stem18, sliding in a bearing 19, rising from the raised portion 13 of theplate 11. A helical spring 20 encircles the stem 18 with one end of thespring abutting against the bearing 19 and the other abutting againstthe latch element 16 at the inner end of the stem. A suitable thumb nut21 is disposed in the chamber 1st and has a stem 22 journaled in theraised portion 13 and extending into the cross groove 17, a

Copies of this patent may be obtained for Specification of LettersPatent.

five cents each, by addressing the Patented Nov. 21, 1916.

Serial No. 82,740.

circular disk being carried in the end of the stem and offset thereonfrom the center of the disk to operate in the cross groove in the natureof a cam. Suitable screws 2st are provided to pass through the plates11, 12 and secure the described article to a sash 25 in a cut at portion26 thereof, a keeper 2? having a depressed or recessed portion 28 forthe reception of an end of the latch element 16, being secured to themember 29 by screws 30.

Referring now to the views it will be clearly seen that rotation of thethumb nut 21 will rotate the offset disk 23 in the cross groove 17,causing the former to engage end portions or walls 31 of the crossgroove and thus slide the latch element 16 into or out of the depressedor recessed portion 28 of the keeper 27, the latch element, whenextending into the portion 28 being adapted to lock the sash 25, andmember 29 against relative movement. The spring 20 is pro vided toprevent rattling of the latch element and also causes one of the wallportions 31 to be in contact with the disk at all times thus taking upany otherwise lost motion of the disk.

From the foregoing it will be seen that the device described can beeasily operated: will effectively accomplish the purpose for which it isdesigned and can be cheaply manufactured and easily assembled,consisting of few parts that cannot readily get out of order or quicklywear out.

Having described my invention, I claim A look comprising an L shapedbody providing a plurality of plates, one of which has an opening andthe other a raised portion, a grooved latch element slidable on theraised portion and having an end passing through the opening, a stem onthe latch element, a bearing on the raised portion and having the stemjournaled therein, a thumb nut in the raised portion, a stem on the nutand journaled in the raised portion, a cam on the stem and operable inthe groove of the latch and a spring encircling the stem to hold thelatch element at all times in contact with the cam.

In testimony whereof I afiiX my signature.

CHARLES L. JOHNSON.

Washington, D. 0.

Gommissioner of Patents,

